su易做图ceview

su易做图ceview：可以使用一个线程来绘图，程序不会因为绘图而失去响应

1.自定义一个su易做图ceview：

class
MySu易做图ceView extends
Su易做图ceView implements
Su易做图ceHolder.Callback
2.实现Su易做图ceHolder.Callback接口的3个回调方法，在su易做图ceCreated中启动绘制线程：

@Override

public
void
su易做图ceChanged(Su易做图ceHolder holder, int
format, int
width,

int
height) {

//
TODO Auto-generated method stub

}

@Override

public
void
su易做图ceCreated(Su易做图ceHolder holder) {

//
启动自定义线程

new
Thread(new
MyThread()).start();

}

@Override

public
void
su易做图ceDestroyed(Su易做图ceHolder holder) {

//
TODO Auto-generated method stub

}

3.注册callback:

public
MySu易做图ceView(Context context) {

super(context);

BackgroundImage =
BitmapFactory.decodeResource(getResources(),

R.drawable.bg);

QuestionImage =
BitmapFactory.decodeResource(getResources(),

R.drawable.question);

Holder =
this.getHolder();//
获取holder

Holder.addCallback(this);

}

4.在绘制线程中绘画：

canvas
=
Holder.lockCanvas();//
获取画布

.//绘画，如canvas.drawBitmap等

Holder.unlockCanvasAndPost(canvas);//
解锁画布，提交画好的图像

补充：移动开发 , Android ,